HOW TO IMPLEMENT WEB SERVICES IN INDY
HOW TO IMPLEMENT
WEB SERVICES FOR INDY
Editor:
Tomáš Mandys, [email protected] (2p plus)
注：捷克網站找到的，非常不錯，我已經寫成了控制元件 呵呵
Document status:
Version 1.0 First release
How to implement Web Services for Indy
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Table of Contents
1. Introduction ...........................................................................................................................3
2. SOAP...................................................................................................................................3
2.1. Server side.....................................................................................................................3
2.2. Server side – SSL..........................................................................................................5
2.3. Client side – SSL ...........................................................................................................5
3. Source code..........................................................................................................................7
3.1. IdWebBroker.pas ...........................................................................................................7
3.2. SOAPPasInv2.pas .......................................................................................................17
3.3. IdSOAPHTTPClient.pas...............................................................................................18
3.4. IdSOAPHTTPTrans.pas...............................................................................................23
Disclaimer
The information of this document is provided ‚“AS IS‘, with no warranties whatsoever, excluding
in particular any warranty of merchantability, fitness for any particular purpose, or any warranty
otherwise arising out of any proposal, specification, or sample. This document is provided for
information purposes only.
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1. Introduction
Web Services are self-contained modular applications that can be published and invoked over
the Internet. Web Services provide well-defined interfaces that describe the services provided.
Unlike Web server applications that generate Web pages for client browsers, Web Services are
not designed for direct human interaction. Rather, they are accessed programmatically by client
applications.
Web Services are designed to allow a loose coupling between client and server. That is, server
implementations do not require clients to use a specific platform or programming language. In
addition to defining interfaces in a language-neutral fashion, they are designed to allow multiple
communications mechanisms as well.
Support for Web Services is designed to work using SOAP (Simple Object Access Protocol).
SOAP is a standard lightweight protocol for exchanging information in a decentralized,
distributed environment. It uses XML to encode remote procedure calls and typically uses HTTP
as a communications protocol. For more information about SOAP, see the SOAP specification
available at
Web Service applications publish information on what interfaces are available and how to call
them using a WSDL (Web Service Definition Language) document. On the server side, your
application can publish a WSDL document that describes your Web Service. On the client side,
a wizard or command-line utility can import a published WSDL document, providing you with the
interface definitions and connection information you need. If you already have a WSDL
document that describes the Web service you want to implement, you can generate the serverside
code as well when importing the WSDL document.
The components that support Web Services are available in all Delphi Professional bundles
since version 6 and Kylix 3. Hence both Windows and Linux platforms are supported.
But Delphi SOAP server side libraries are developed for interaction with Microsoft Internet
Information Server (ISAPI), Netscape Information Server (NSAPI) or Apache. They are based
on TWebApplication class that in addition does not support more instances in one executable.
Hence it is not supported creating SOAP server application based on small custom HTTP
server implemented using Indy components TIdHttpServer.
Second disadvantage of Delphi SOAP libraries that is not supported secure HTTP
communication (HTTPS protocol = HTTP + SSL) neither at server nor client side.
Let’s demonstrate how to develop TWebApplication compliant class using Indy HTTP server
and how to add HTTPS support.
2. SOAP
2.1. Server side
Since Delphi SOAP components are based on TWebApplication class it’s necessary to write an
ancestor of TWebApplication that will serve HTTP requests from TIdHttpServer. Such class
named TIdWebApplication is implemented in IdWebBrooker unit that cooperates with
TIdWebModule (ancestor of TWebModule). A real TIdWebModule defining published SOAP
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interface method and assigned to TIdWebApplication.WebModuleClass automatically generates
WSDL document describing supported interfaces. When a client calls a method TWebModule
and its SOAPInvoker property calls automatically method implementation or a TWebActionItem.
TSOAPInvoker class is defined in SOAPPasInv2 unit.
Example:
The example code defines one published IMyInterface.published_soap_method method.
TMyWebModule server does automatic invoking using OnAction_published_soap_method or
published_soap_method.
type
{ define published interface }
IMyInterface = interface(IInvokable) ['{CE958F31-9770-34B6-1177-51D0779D1891}']
function published_soap_method(const I: Integer): Integer; stdcall;
end;
type
{ implement interface methods }
TMyWebModule = class(TIdWebModule, IMyInterface)
private
{ method called by TWebActionItem – optional }
function OnAction_published_soap_method(
Sender: TObject;
Request: TWebRequest;
Response: TWebResponse;
var Handled: Boolean);
{ method called by invoker – optional }
function published_soap_method(const I: Integer): Integer; stdcall;
protected
procedure InitModule; override;
public
constructor Create(aOwner: TComponent); override;
end;
TMyWebApplication = class(TIdWebApplication)
private
end;
{ TMyWebModule }
constructor TMyWebModule.Create(aOwner: TComponent);
var
A: TWebActionItem;
begin
inherited;
A:= Actions.Add;
A.Default:= True;
A.Enabled:= True;
A.PathInfo:= '/IMyInterface/published_soap_method';
A.OnAction:= OnAction_published_soap_method;
end;
procedure TMyWebModule.InitModule;
begin
inherited;
// do a custom initialization here
...
// WSDLPublish.TargetNamespace:=
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end;
procedure TMyWebModule.OnAction_published_soap_method(
Sender: TObject;
Request: TWebRequest;
Response: TWebResponse;
var Handled: Boolean);
begin
showmessage('OnSendAction');
// Invoke(InvClassType, IntfInfo, ActionMeth, Request, Response, BindingType);
// Handled:= True;
end;
function TMyWebModule.published_soap_method (I: Integer): Integer;
begin
showmessage('INVOKED send');
end;
var
fMySOAPServer: TMyWebApplication;
begin
fMySOAPServer:= TMyWebApplication.Create(Self);
fMySOAPServer.HttpServer.DefaultPort:= 80;
fMySOAPServer.WebModuleClass := TMyWebModule;
fMySOAPServer.Run;
end;
2.2. Server side – SSL
TIdWebApplication provides public HttpServer property. Developer can customize it to accept
HTTPS connection so that assigns an instance of TIdServerInterceptOpenSSL to the
HttpServer.Intercept property to allow use of the HTTPS protocol. For the Windows platform,
you must install the Indy OpenSSL support .DLL's available at
Secure Socket Layer support.
2.3. Client side – SSL
Delphi supports SOAP clients using SOAPHttpClient and SOAPHttpTrans units. These libraries
use WinInit unit that is based on wininet.dll library on Windows or on internal instance of TIdHttp
on Linux. HTTPS is not supported.
We implemented native Indy support into IdSOAPHttpClient and IdSOAPHttpTrans units.
TIdHTTPReqResp provides HttpClient property of TIdCustomHttp class.
Developer creates TIdHTTPRIO instance and initializes HTTPWebNode.HttpClient property.
Using of TIdHTTPRIO is absolutely the same as THTTPRIO. For more information see Using
Web Services Delphi documentation.
Example
The example code demonstrates TIdHTTPRio initialization for SSL connection. Note that code
slightly differs for Indy v.9 or v.10.
var
SoapClient: TIdHTTPRIO;
SSLRequired: Boolean;
begin
SoapClient:= TIdHTTPRIO.Create(Self);
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with SoapClient.HTTPWebNode.HttpClient do
begin
AllowCookies:= True;
HandleRedirects:= False;
ProtocolVersion:= pv1_1;
{$IFNDEF INDY10}
MaxLineLength:= 16384;
RecvBufferSize:= 32768;
{$ENDIF}
if not SSLRequired then
begin // HTTP
{$IFDEF INDY10}
CreateIOHandler(nil);
{$ELSE}
IOHandler.Free;
IOHandler:= nil;
{$ENDIF}
end
else
begin // HTTPS
{$IFDEF INDY10}
IOHandler:= TIdSSLIOHandlerSocketOpenSSL.Create(
SoapClient.HTTPWebNode.HttpClient);
{$ELSE}
IOHandler:= TIdSSLIOHandlerSocket.Create(SoapClient.HTTPWebNode.HttpClient);
{$ENDIF}
with {$IFDEF INDY10}
TIdSSLIOHandlerSocketOpenSSL
{$ELSE}
TIdSSLIOHandlerSocket
{$ENDIF}(IOHandler), SSLOptions do
begin
Method:= sslvSSLv2; // select SSL method
CertFile:= 'my.crt'; // assign certificate
KeyFile:= 'my.key'; // assign private key
RootCertFile:= 'root.crt';
// select verification method for server certificate
VerifyMode:= [sslvrfPeer, sslvrfFailIfNoPeerCert, sslvrfClientOnce];
VerifyDepth:= 1;
OnVerifyPeer:= DoOnVerifyPeer;
end;
end;
end;
end;
SoapClient.HTTPWebNode.OnLog:= SoapClientOnLog; // custom logging
// set correct ReadTimeout
TIdTCPClient(SoapClient.HTTPWebNode.HttpClient).OnConnected:=
HttpClientOnConnected;
end;
procedure TMyClient.HttpClientOnConnected(Sender: TObject);
var
S: string;
begin
with (Sender as TIdCustomHTTP)
{$IFDEF INDY10}, TIdIOHandlerStack(IOHandler){$ENDIF} do
ReadTimeout:= 1000;
end;
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3. Source code
3.1. IdWebBroker.pas
unit IdWebBrooker;
interface
uses
Classes, WebBroker, WebBrokerSOAP, IdHTTPServer, IdCustomHTTPServer, IdTCPServer,
HTTPApp, SOAPHTTPPasInv, WSDLPub
{$IFDEF INDY10}, IdContext{$ENDIF};
type
TIdSoapHTTPServer = class(TIdHTTPServer)
protected
procedure DoCommandGet({$IFDEF INDY10}AContext: TIdContext{$ELSE}AThread:
TIdPeerThread{$ENDIF}; ARequestInfo: TIdHTTPRequestInfo; AResponseInfo:
TIdHTTPResponseInfo); override;
public
constructor Create(aOwner: TComponent); override;
end;
TIdWebRequest = class(TWebRequest)
private
FIdHttpServer: TIdCustomHTTPServer;
FIdRequest: TIdHTTPRequestInfo;
FIdResponse: TIdHTTPResponseInfo;
FPort: Integer;
FReadClientIndex: Integer;
protected
{ Abstract methods overridden }
function GetStringVariable(Index: Integer): string; override;
function GetIntegerVariable(Index: Integer): Integer; override;
function GetDateVariable(Index: Integer): TDateTime; override;
public
constructor Create(IdHttpServer: TIdCustomHTTPServer; IdRequest:
TIdHTTPRequestInfo; IdResponse: TIdHTTPResponseInfo);
destructor Destroy; override;
{ Abstract methods overridden }
// Read count bytes from client
function ReadClient(var Buffer; Count: Integer): Integer; override;
// Read count characters as a string from client
function ReadString(Count: Integer): string; override;
// Translate a relative URI to a local absolute path
function TranslateURI(const URI: string): string; override;
// Write count bytes back to client
function WriteClient(var Buffer; Count: Integer): Integer; override;
// Write string contents back to client
function WriteString(const AString: string): Boolean; override;
// Write HTTP header string
function WriteHeaders(StatusCode: Integer; const ReasonString, Headers: string):
Boolean; override;
function GetFieldByName(const Name: string): string; override;
property IdRequestInfo: TIdHTTPRequestInfo read FIdRequest;
end;
TIdWebResponse = class(TWebResponse)
private
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FIdResponse: TIdHTTPResponseInfo;
FSent: boolean;
protected
{ Abstract methods overridden }
function GetStringVariable(Index: Integer): string; override;
procedure SetStringVariable(Index: Integer; const Value: string); override;
function GetDateVariable(Index: Integer): TDateTime; override;
procedure SetDateVariable(Index: Integer; const Value: TDateTime); override;
function GetIntegerVariable(Index: Integer): Integer; override;
procedure SetIntegerVariable(Index: Integer; Value: Integer); override;
function GetContent: string; override;
procedure SetContent(const Value: string); override;
procedure SetContentStream(Value: TStream); override;
function GetStatusCode: Integer; override;
procedure SetStatusCode(Value: Integer); override;
function GetLogMessage: string; override;
procedure SetLogMessage(const Value: string); override;
public
{ Abstract methods overridden }
procedure SendResponse; override;
procedure SendRedirect(const URI: string); override;
procedure SendStream(AStream: TStream); override;
public
constructor Create(Request: TWebRequest; Response: TIdHTTPResponseInfo);
destructor Destroy; override;
function Sent: Boolean; override;
procedure SetCookieField(Values: TStrings; const ADomain, APath: string;
AExpires: TDateTime; ASecure: Boolean);
property IdResponse: TIdHTTPResponseInfo read FIdResponse;
end;
TIdWebApplication = class;
TIdWebModule = class(TCustomWebDispatcher, IWebRequestHandler)
private
fSOAPDispatcher: THTTPSoapDispatcher;
fSOAPInvoker: THTTPSoapPascalInvoker;
fWSDLPublish: TWSDLHTMLPublish;
fWebApplication: TIdWebApplication;
protected
function HandleRequest(Request: TWebRequest; Response: TWebResponse): Boolean;
procedure InitModule; virtual;
public
property WebApplication: TIdWebApplication read fWebApplication;
property SOAPDispatcher: THTTPSoapDispatcher read fSOAPDispatcher;
property SOAPInvoker: THTTPSoapPascalInvoker read fSOAPInvoker;
property WSDLPublish: TWSDLHTMLPublish read fWSDLPublish;
constructor Create(aOwner: TComponent); override;
end;
TIdWebApplication = class(TWebApplication)
private
FHTTPServer: TIdHTTPServer;
protected
public
constructor Create(AOwner: TComponent); override;
destructor Destroy; override;
procedure Run; override;
function HandleRequest(Request: TWebRequest; Response: TWebResponse): Boolean; //
to be public
property HTTPServer: TIdHTTPServer read FHTTPServer;
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end;
implementation
uses
SysUtils, BrkrConst, IdHTTPHeaderInfo, IdHeaderList, Math, SOAPPasInv2;
{ TIdSoapHTTPServer }
constructor TIdSoapHTTPServer.Create(aOwner: TComponent);
begin
inherited;
FOkToProcessCommand:= True;
end;
procedure TIdSoapHTTPServer.DoCommandGet({$IFDEF INDY10}AContext:
TIdContext{$ELSE}AThread: TIdPeerThread{$ENDIF}; ARequestInfo: TIdHTTPRequestInfo;
AResponseInfo: TIdHTTPResponseInfo);
var
Request: TIdWebRequest;
Response: TIdWebResponse;
begin
Request:= TIdWebRequest.Create(Self, ARequestInfo, aResponseInfo);
try
Response := TIdWebResponse.Create(Request, AResponseInfo);
try
TIdWebApplication(Owner).HandleRequest(Request, Response);
finally
Response.Free;
end;
finally
Request.Free;
end;
inherited;
end;
{ TIdWebApplication }
constructor TIdWebApplication.Create(AOwner: TComponent);
begin
inherited;
FHTTPServer:= TIdSoapHTTPServer.Create(Self);
end;
destructor TIdWebApplication.Destroy;
begin
inherited;
end;
procedure TIdWebApplication.Run;
begin
inherited;
fHTTPServer.Active:= True;
end;
function TIdWebApplication.HandleRequest(Request: TWebRequest; Response:
TWebResponse): Boolean;
begin
Result:= inherited HandleRequest(Request, Response);
end;
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{ TIdWebRequest }
constructor TIdWebRequest.Create(IdHttpServer: TIdCustomHTTPServer; IdRequest:
TIdHTTPRequestInfo; IdResponse: TIdHTTPResponseInfo);
begin
FIdHttpServer:= IdHttpServer;
FIdRequest := IdRequest;
FIdResponse:= IdResponse;
FPort:= IdHTTPServer.Bindings[0].Port; // IdHttpServer.DefaultPort;
inherited Create;
end;
destructor TIdWebRequest.Destroy;
begin
inherited;
end;
function StripHTTP(const Name: string): string;
begin
if Pos('HTTP_', Name) = 1 then
Result := Copy(Name, Length('HTTP_')+1, MaxInt)
else
Result := Name;
end;
function TIdWebRequest.GetFieldByName(const Name: string): string;
begin
{$IF gsIdVersion = '8.0.25'} // D6, K2 compatible
Result := FIdRequest.Headers.Values[StripHTTP(Name)];
{$ELSE}
Result := FIdRequest.RawHeaders.Values[StripHTTP(Name)];
{$IFEND}
end;
const
viMethod = 0;
viProtocolVersion = 1;
viURL = 2;
viQuery = 3;
viPathInfo = 4;
viPathTranslated = 5;
viCacheControl = 6;
viDate = 7;
viAccept = 8;
viFrom = 9;
viHost = 10;
viIfModifiedSince = 11;
viReferer = 12;
viUserAgent = 13;
viContentEncoding = 14;
viContentType = 15;
viContentLength = 16;
viContentVersion = 17;
viDerivedFrom = 18;
viExpires = 19;
viTitle = 20;
viRemoteAddr = 21;
viRemoteHost = 22;
viScriptName = 23;
viServerPort = 24;
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viContent = 25;
viConnection = 26;
viCookie = 27;
viAuthorization = 28;
function TIdWebRequest.GetDateVariable(Index: Integer): TDateTime;
begin
case Index of
viDate: Result:= FIdRequest.Date;
viIfModifiedSince: Result:= FIdRequest.LastModified;
viExpires: Result:= FIdRequest.Expires;
else
Result:= 0;
end;
end;
function TIdWebRequest.GetIntegerVariable(Index: Integer): Integer;
begin
case Index of
viContentLength: Result:= FIdRequest.ContentLength;
viServerPort: Result:= fPort;
else
Result:= 0;
end;
end;
function TIdWebRequest.GetStringVariable(Index: Integer): string;
function HeaderValue(S: string): string;
begin
{$IF gsIdVersion = '8.0.25'} // D6, K2 compatible
Result := FIdRequest.Headers.Values[S];
{$ELSE}
Result := FIdRequest.RawHeaders.Values[S];
{$IFEND}
end;
function GetScriptName: string;
var
SlashPos: Integer;
begin
Result := FIdRequest.Document;
if Length(Result) > 0 then
begin
Delete(Result, 1, 1); // delete the first /
SlashPos := Pos('/', Result);
if SlashPos <> 0 then
Delete(Result, SlashPos, MaxInt); // delete everything after the next /
// Add back in the starting slash
Result := '/' + Result;
end;
end;
begin
case Index of
viMethod: Result := FIdRequest.Command; // ExtractFileName(FIdRequest.Command)
viProtocolVersion: Result := FIdRequest.Version;
viURL: Result := ''; // Not implemented
viQuery:
if FIdRequest.ContentLength > 0 then
Result := FIdRequest.UnparsedParams
else
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Result := '';
viPathInfo: Result:= FIdRequest.Document;
viPathTranslated: Result := FIdRequest.Document; // Not implemented
viCacheControl: Result := FIdRequest.CacheControl;
viAccept: Result := FIdRequest.Accept;
viFrom: Result := FIdRequest.From;
viHost: Result := FIdRequest.Host;
viReferer: Result := FIdRequest.Referer;
viUserAgent: Result := FIdRequest.UserAgent;
viContentEncoding: Result := FIdRequest.ContentEncoding;
viContentType: Result := FIdRequest.ContentType;
viContentVersion: Result := FIdRequest.ContentVersion;
viDerivedFrom: Result := ''; // Not implemented
viTitle: Result := ''; // Not implemented
viRemoteAddr,
viRemoteHost: Result := FIdRequest.RemoteIP;
viScriptName: Result := ''; // GetScriptName;
viContent: Result := FIdRequest.UnparsedParams;
viConnection: Result := FIdRequest.Connection;
viCookie: Result:= HeaderValue('Cookie');
viAuthorization: Result := FIdRequest.Authentication.Authentication;
else
Result := '';
end;
end;
function TIdWebRequest.ReadClient(var Buffer; Count: Integer): Integer;
begin
Count := Max(Length(FIdRequest.UnparsedParams) - FReadClientIndex, Count);
if Count > 0 then
begin
Move(FIdRequest.UnparsedParams[FReadClientIndex+1], Buffer, Count);
Inc(FReadClientIndex, Count);
Result := Count;
end
else
Result := 0;
end;
function TIdWebRequest.ReadString(Count: Integer): string;
var
Len: Integer;
begin
SetLength(Result, Count);
Len := ReadClient(Pointer(Result)^, Count);
if Len > 0 then
SetLength(Result, Len)
else
Result := '';
end;
function TIdWebRequest.TranslateURI(const URI: string): string;
begin
Result := URI;
end;
function TIdWebRequest.WriteClient(var Buffer; Count: Integer): Integer;
var
S: string;
begin
Result := Count;
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try
SetString(S, PChar(@Buffer), Count);
FIdResponse.ContentText := S;
FIdResponse.WriteContent;
except
Result := 0;
end;
end;
type
TIdHTTPResponseInfoCracker = class(TIdHTTPResponseInfo)
end;
function TIdWebRequest.WriteHeaders(StatusCode: Integer;
const ReasonString, Headers: string): Boolean;
begin
// Result := True;
TIdHTTPResponseInfoCracker(FIdResponse).FHeaderHasBeenWritten := True;
Result := WriteString(Format('HTTP/1.1 %s'#13#10'%s', [ReasonString, Headers]));
end;
function TIdWebRequest.WriteString(const AString: string): Boolean;
begin
Result := WriteClient(Pointer(AString)^, Length(AString)) = Length(AString);
end;
{ TIdWebResponse }
constructor TIdWebResponse.Create(Request: TWebRequest;
Response: TIdHTTPResponseInfo);
begin
inherited Create(Request);
FIdResponse := Response;
FIdResponse.ContentType:= 'text/xml';
end;
destructor TIdWebResponse.Destroy;
begin
FIdResponse.ContentStream.Free;
FIdResponse.ContentStream := nil;
inherited;
end;
function TIdWebResponse.GetContent: string;
begin
Result := FIdResponse.ContentText;
end;
procedure TIdWebResponse.SetContent(const Value: string);
begin
FIdResponse.ContentText := Value;
FIdResponse.ContentLength := Length(Value);
end;
function TIdWebResponse.GetLogMessage: string;
begin
Result := ''; // N/A
end;
procedure TIdWebResponse.SetLogMessage(const Value: string);
begin
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// N/A
end;
function TIdWebResponse.GetStatusCode: Integer;
begin
Result := FIdResponse.ResponseNo;
end;
procedure TIdWebResponse.SetStatusCode(Value: Integer);
begin
FIdResponse.ResponseNo := Value;
end;
procedure TIdWebResponse.SendRedirect(const URI: string);
begin
FIdResponse.Redirect(URI);
SendResponse;
end;
procedure TIdWebResponse.SendResponse;
begin
FIdResponse.WriteHeader;
FIdResponse.WriteContent;
{
fIdResponse.FreeContentStream:= True;
ContentStream.Position:= 0;
fIdResponse.ContentStream:= TMemoryStream.Create;
fIdResponse.ContentStream.CopyFrom(ContentStream, ContentStream.Size);}
FSent := True;
end;
procedure TIdWebResponse.SendStream(AStream: TStream);
begin
FIdResponse.ContentStream := AStream;
try
FIdResponse.WriteContent;
finally
FIdResponse.ContentStream := nil;
end;
end;
function TIdWebResponse.Sent: Boolean;
begin
Result := FSent;
end;
procedure TIdWebResponse.SetCookieField(Values: TStrings; const ADomain,
APath: string; AExpires: TDateTime; ASecure: Boolean);
begin
end;
const
vjDate = 0;
vjExpires = 1;
vjLastModified = 2;
vjContentLength = 0;
vjVersion = 0;
vjReasonString = 1;
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vjServer = 2;
vjWWWAuthenticate = 3;
vjRealm = 4;
vjAllow = 5;
vjLocation = 6;
vjContentEncoding = 7;
vjContentType = 8;
vjContentVersion = 9;
vjDerivedFrom = 10;
vjTitle = 11;
function TIdWebResponse.GetDateVariable(Index: Integer): TDateTime;
begin
case Index of
vjDate: Result:= fIdResponse.Date;
vjExpires: Result:= fIdResponse.Expires;
vjLastModified: Result:= fIdResponse.LastModified;
else
Result:= 0;
end;
end;
procedure TIdWebResponse.SetDateVariable(Index: Integer;
const Value: TDateTime);
begin
inherited;
case Index of
vjDate: fIdResponse.Date:= Value;
vjExpires: fIdResponse.Expires:= Value;
vjLastModified: fIdResponse.LastModified:= Value;
end;
end;
function TIdWebResponse.GetIntegerVariable(Index: Integer): Integer;
begin
case Index of
vjContentLength: Result:= fIdResponse.ContentLength;
else
Result := 0;
end;
end;
procedure TIdWebResponse.SetIntegerVariable(Index, Value: Integer);
begin
inherited;
case Index of
vjContentLength: fIdResponse.ContentLength:= Value;
else
end;
end;
const
HTTPResponseNames: array[0..11] of string = (
'',
'',
'',
'WWW-Authenticate',
'',
'Allow',
'',
'',
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'',
'',
'Derived-From',
'Title'
);
function TIdWebResponse.GetStringVariable(Index: Integer): string;
begin
Result := '';
case Index of
vjVersion: Result:= '1.1';
vjReasonString: Result:= fIdResponse.ResponseText;
vjServer: Result:= fIdResponse.ServerSoftware;
vjRealm: Result:= fIdResponse.AuthRealm;
vjLocation: Result:= fIdResponse.Location;
vjContentEncoding: Result:= fIdResponse.ContentEncoding;
vjContentType: Result:= fIdResponse.ContentType;
vjContentVersion: Result:= fIdResponse.ContentVersion;
else
if Index in [Low(HTTPResponseNames)..High(HTTPResponseNames)] then
Result:= FIdResponse.RawHeaders.Values[HTTPResponseNames[Index]];
end;
end;
procedure TIdWebResponse.SetStringVariable(Index: Integer;
const Value: string);
begin
case Index of
vjVersion: ;
vjReasonString: fIdResponse.ResponseText:= Value;
vjServer: fIdResponse.ServerSoftware:= Value;
vjRealm: fIdResponse.AuthRealm:= Value;
vjLocation: fIdResponse.Location:= Value;
vjContentEncoding: fIdResponse.ContentEncoding:= Value;
vjContentType: fIdResponse.ContentType:= Value;
vjContentVersion: fIdResponse.ContentVersion:= Value;
else
if Index in [Low(HTTPResponseNames)..High(HTTPResponseNames)] then
FIdResponse.RawHeaders.Values[HTTPResponseNames[Index]]:= Value;
end;
end;
procedure TIdWebResponse.SetContentStream(Value: TStream);
begin
FIdResponse.ContentStream := Value;
FIdResponse.ContentLength := Value.Size;
end;
{ TIdWebModule }
constructor TIdWebModule.Create(aOwner: TComponent);
begin
inherited;
fSOAPDispatcher:= THTTPSoapDispatcher.Create(Self);
fSOAPInvoker:= THTTPSoapPascalInvoker.Create(Self);
TSoapPascalInvokerProvidingInvoker.AdjustSOAPHeaders(fSOAPInvoker);
fWSDLPublish:= TWSDLHTMLPublish.Create(Self);
fSOAPDispatcher.Dispatcher:= fSOAPInvoker;
end;
function TIdWebModule.HandleRequest(Request: TWebRequest;
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Response: TWebResponse): Boolean;
begin
if Request is TIdWebRequest then
fWebApplication:= TIdWebRequest(Request).FIdHttpServer.Owner as TIdWebApplication
else
fWebApplication:= nil;
InitModule;
Result:= inherited HandleRequest(Request, Response);
end;
procedure TIdWebModule.InitModule;
begin
end;
end.
3.2. SOAPPasInv2.pas
unit SOAPPasInv2;
interface
uses
Classes, InvokeRegistry, SOAPPasInv;
type
TSoapPascalInvokerProvidingInvoker = class(TSoapPascalInvoker)
public
class procedure AdjustSOAPHeaders(aSelf: TSoapPascalInvoker);
class function GetInvoker(aClass: TInvokableClass): TSoapPascalInvoker;
end;
THeaderListWithInvoker = class(THeaderList)
protected
fInvoker: TSoapPascalInvoker;
end;
implementation
type
TInvokableClassCrack = class(TInvokableClass)
end;
TSOAPHeadersBaseCrack = class(TSOAPHeadersBase)
end;
{ TSoapPascalInvokerProvidingInvoker }
class function TSoapPascalInvokerProvidingInvoker.GetInvoker(
aClass: TInvokableClass): TSoapPascalInvoker;
begin
with TInvokableClassCrack(aClass), TSOAPHeadersBaseCrack(fSOAPHeaders) do
if FHeadersInbound is THeaderListWithInvoker then
Result:= THeaderListWithInvoker(FHeadersInbound).fInvoker
else
Result:= nil;
end;
class procedure TSoapPascalInvokerProvidingInvoker.AdjustSOAPHeaders(
aSelf: TSoapPascalInvoker);
How to implement Web Services for Indy
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begin
if not (TSoapPascalInvokerProvidingInvoker(aSelf).fHeadersIn is
THeaderListWithInvoker) then
begin
TSoapPascalInvokerProvidingInvoker(aSelf).FHeadersIn.Free;
TSoapPascalInvokerProvidingInvoker(aSelf).FHeadersIn:=
THeaderListWithInvoker.Create;
THeaderListWithInvoker(TSoapPascalInvokerProvidingInvoker(aSelf).FHeadersIn).fInvoker
:= aSelf;
TSoapPascalInvokerProvidingInvoker(aSelf).FHeadersIn.OwnsObjects := False;
end;
end;
end.
3.3. IdSOAPHTTPClient.pas
unit IdSOAPHTTPClient;
interface
uses Classes, Rio, WSDLNode, WSDLItems, OPConvert, OPToSOAPDomConv, IdSOAPHTTPTrans,
WebNode, XMLIntf;
type
TIdHTTPRIO = class(TRIO)
private
FWSDLItems: TWSDLItems;
WSDLItemDoc: IXMLDocument;
FWSDLView: TWSDLView;
FWSDLLocation: string;
FDOMConverter: TOPToSoapDomConvert;
FHTTPWebNode: TIdHTTPReqResp;
FDefaultConverter: TOPToSoapDomConvert;
FDefaultWebNode: TIdHTTPReqResp;
procedure ClearDependentWSDLView;
procedure SetWSDLLocation(Value: string);
function GetPort: string;
procedure SetPortValue(Value: string);
function GetService: string;
procedure SetService(Value: string);
procedure CheckWSDLView;
procedure SetURL(Value: string);
function GetDomConverter: TOpToSoapDomConvert;
procedure SetDomConverter(Value: TOPToSoapDomConvert);
function GetHTTPWebNode: TIdHTTPReqResp;
procedure SetHTTPWebNode(Value: TIdHTTPReqResp);
function GetURL: string;
function GetDefaultWebNode: TIdHTTPReqResp;
function GetDefaultConverter: TOPToSoapDomConvert;
protected
procedure Notification(AComponent: TComponent; Operation: TOperation); override;
public
constructor Create(AOwner: TComponent); override;
destructor Destroy; override;
function QueryInterface(const IID: TGUID; out Obj): HResult; override; stdcall;
property WSDLItems: TWSDLItems read FWSDLItems;
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published
property WSDLLocation: string read FWSDLLocation write SetWSDLLocation;
property Service: string read GetService write SetService;
property Port: string read GetPort write SetPortValue;
property URL: string read GetURL write SetURL;
property HTTPWebNode: TIdHTTPReqResp read GetHTTPWebNode write SetHTTPWebNode;
property Converter: TOPToSoapDomConvert read GetDomConverter write
SetDOMConverter;
end;
implementation
uses SysUtils, InvokeRegistry;
constructor TIdHTTPRIO.Create(AOwner: TComponent);
begin
inherited Create(AOwner);
{ Converter }
FDomConverter := GetDefaultConverter;
FConverter := FDomConverter as IOPConvert;
{ WebNode }
FHTTPWebNode := GetDefaultWebNode;
FWebNode := FHTTPWebNode as IWebNode;
end;
destructor TIdHTTPRIO.Destroy;
begin
if Assigned(FConverter) then
FConverter := nil;
if Assigned(FWebNode) then
FWebNode := nil;
if Assigned(FWSDLView) then
FWSDLView.Free;
{ All components we own are automatically cleaned up }
inherited;
end;
function TIdHTTPRIO.GetDefaultWebNode: TIdHTTPReqResp;
begin
if (FDefaultWebNode = nil) then
begin
FDefaultWebNode := TIdHTTPReqResp.Create(Self);
FDefaultWebNode.Name := 'HTTPWebNode1'; { do not localize }
FDefaultWebNode.SetSubComponent(True);
end;
Result := FDefaultWebNode;
end;
function TIdHTTPRIO.GetDefaultConverter: TOPToSoapDomConvert;
begin
if (FDefaultConverter = nil) then
begin
FDefaultConverter := TOPToSoapDomConvert.Create(Self);
FDefaultConverter.Name := 'Converter1'; { do not localize }
FDefaultConverter.SetSubComponent(True);
end;
Result := FDefaultConverter;
end;
procedure TIdHTTPRIO.ClearDependentWSDLView;
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begin
if Assigned(FDomConverter) and Assigned(FDOMConverter.WSDLView) then
FDOMConverter.WSDLView := nil;
if Assigned(FHTTPWebNode) and Assigned(FHTTPWebNode.WSDLView) then
FHTTPWebNode.WSDLView := FWSDLView;
end;
procedure TIdHTTPRIO.CheckWSDLView;
begin
if not Assigned(FWSDLItems) then
begin
if not Assigned(FWSDLItems) then
begin
FWSDLItems := TWSDLItems.Create(nil);
WSDLItemDoc := FWSDLItems;
end;
if not Assigned(FWSDLView) then
begin
FWSDLView := TWSDLView.Create(nil);
FWSDLView.SetDesignState(csDesigning in ComponentState);
end;
FWSDLView.WSDL := FWSDLItems;
if Assigned(FDomConverter) then
FDOMConverter.WSDLView := FWSDLView;
if Assigned(FHTTPWebNode) then
FHTTPWebNode.WSDLView := FWSDLView;
end;
end;
function TIdHTTPRIO.GetPort: string;
begin
if Assigned(FWSDLView) then
Result := FWSDLView.Port
else
Result := '';
end;
function TIdHTTPRIO.GetService: string;
begin
if Assigned(FWSDLView) then
Result := FWSDLView.Service
else
Result := '';
end;
procedure TIdHTTPRIO.SetPortValue(Value: string);
begin
if Assigned(FWSDLView) then
FWSDLView.Port := Value;
end;
procedure TIdHTTPRIO.SetService(Value: string);
begin
if Assigned(FWSDLView) then
FWSDLView.Service := Value;
end;
procedure TIdHTTPRIO.SetURL(Value: string);
begin
if Assigned(FHTTPWebNode) then
begin
How to implement Web Services for Indy
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FHTTPWebNode.URL := Value;
if Value <> '' then
begin
WSDLLocation := '';
ClearDependentWSDLView;
end;
end;
end;
procedure TIdHTTPRIO.SetWSDLLocation(Value: string);
begin
{ WSDLLocation and URL are currently mutually exclusive }
{ So clear out URL if we're setting a WSDLLocation }
if (Value <> '') and (URL <> '') then
FHTTPWebNode.URL := '';
{ Clear any currently cached WSDLs.
NOTE: A RIO can only be bound to one given interface.
Therefore switching WSDL will be a rather rare
scenario. However, it's possible to have multiple
Services that implement the same portype but
expose different WSDLs. Case in point is the
Interop Service that are exposed by various
SOAP vendors. So to that end, we'll clear
the WSDL Cache }
if Assigned(FWSDLItems) and (WSDLItemDoc <> nil) then
begin
WSDLItemDoc := nil;
FWSDLItems := nil;
end;
{ This will recreate the WSDLView/Items }
CheckWSDLView;
{ Deactivate }
if FWSDLItems.Active then
FWSDLItems.Active := False;
FWSDLLocation := Value;
{ Store the WSDLLocation as the FileName of the TWSDLItems }
FWSDLItems.FileName := Value;
FWSDLView.Port := '';
FWSDLView.Service := '';
end;
function TIdHTTPRIO.QueryInterface(const IID: TGUID; out Obj): HResult;
begin
Result := inherited QueryInterface(IID, Obj);
{ Here we check if we just bounded to an interface - and if yes, we retrieve
& update items that are HTTP/transport specific }
if Result = 0 then
begin
if IsEqualGUID(IID, FIID) then
begin
FHTTPWebNode.SoapAction := InvRegistry.GetActionURIOfIID(IID);
end;
end;
end;
function TIdHTTPRIO.GetDomConverter: TOPToSoapDomConvert;
begin
if not Assigned(FDomConverter) then
begin
FDomConverter := GetDefaultConverter;
FConverter := FDomConverter as IOPConvert;
How to implement Web Services for Indy
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end;
Result := FDomConverter;
end;
procedure TIdHTTPRIO.SetDomConverter(Value: TOPToSoapDomConvert);
begin
if Assigned(FDOMConverter) and (FDomConverter.Owner = Self) then
begin
FConverter := nil;
if FDomConverter <> FDefaultConverter then
FDomConverter.Free;
end;
FDomConverter := Value;
if Value <> nil then
begin
FConverter := Value;
FDomConverter.FreeNotification(Self);
FDomConverter.WSDLView := FWSDLView;
end;
end;
function TIdHTTPRIO.GetHTTPWebNode: TIdHTTPReqResp;
begin
if not Assigned(FHTTPWebNode) then
begin
FHTTPWebNode := GetDefaultWebNode;
FWebNode := FHTTPWebNode as IWebNode;
end;
Result := FHTTPWebNode;
end;
procedure TIdHTTPRIO.SetHTTPWebNode(Value: TIdHTTPReqResp);
var
URL, UDDIOperator, UDDIBindingKey: string;
begin
if Assigned(FHTTPWebNode) then
begin
{ Save previous endpoint configuration }
URL := FHTTPWebNode.URL;
{ Cleanup if we're owner and it's not out default one }
if (FHTTPWebNode.Owner = Self) and (FHTTPWebNode <> FDefaultWebNode) then
begin
FWebNode := nil;
FHTTPWebNode.Free;
end
end
else
begin
URL := '';
UDDIOperator := '';
UDDIBindingKey := '';
end;
FHTTPWebNode := Value;
if Value <> nil then
begin
FWebNode := Value;
{ Make sure we get notified so we may cleanup properly }
FHTTPWebNode.FreeNotification(Self);
How to implement Web Services for Indy
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{ WSDLView }
FHTTPWebNode.WSDLView := FWSDLView;
end
else
begin
FHTTPWebNode := FDefaultWebNode;
FWebNode := FHTTPWebNode as IWebNode;
end;
{ Transfer previous endpoint configuration }
if FHTTPWebNode <> nil then
begin
if (URL <> '') and (FHTTPWebNode.URL = '') then
FHTTPWebNode.URL := URL;
end;
end;
function TIdHTTPRIO.GetURL: string;
begin
if Assigned(FHTTPWebNode) then
Result := FHTTPWebNode.URL
else
Result := '';
end;
procedure TIdHTTPRIO.Notification(AComponent: TComponent;
Operation: TOperation);
begin
inherited;
if (Operation = opRemove) and (AComponent = FHTTPWebNode) then
begin
FWebNode := nil;
FHTTPWebNode := nil;
end;
if (Operation = opRemove) and (AComponent = FDomConverter) then
begin
FConverter := nil;
FDomConverter := nil;
end;
end;
end.
3.4. IdSOAPHTTPTrans.pas
unit IdSOAPHTTPTrans;
interface
uses
SysUtils, Classes, WebNode, WSDLNode, Types, IntfInfo, WSDLIntf, SOAPAttachIntf,
IdHTTP, IdIOHandlerSocket, IdSSLOpenSSL;
type
EIdSOAPHTTPException = class(Exception)
private
FStatusCode: Integer;
public
constructor Create(const Msg: string; SCode: Integer = 0);
How to implement Web Services for Indy
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constructor CreateFmt(const Msg: string; const Args: array of const; SCode:
Integer = 0);
property StatusCode: Integer read FStatusCode write FStatusCode;
end;
IdSOAPInvokeOptions = (soNoValueForEmptySOAPAction, { Send "" or absolutely no
value for empty SOAPAction }
soIgnoreInvalidCerts { xxx Handle Invalid Server
Cert and ask HTTP runtime to ignore }
);
TIdSOAPInvokeOptions= set of IdSOAPInvokeOptions;
TIdHTTPReqRespOnLog = procedure (Sender: TComponent; aOutbound, aHeader: Boolean;
St: TStream) of object;
TIdHTTPReqResp = class;
{ Provides access to HTTPReqResp component }
IIdHTTPReqResp = interface
['{5FA6A197-32DE-4225-BC85-216CB80D1561}']
function GetHTTPReqResp: TIdHTTPReqResp;
end;
TIdHTTPReqResp = class(TComponent, IInterface, IWebNode, IIdHTTPReqResp)
private
FUserSetURL: Boolean;
FRefCount: Integer;
FOwnerIsComponent: Boolean;
FURL: string;
FBindingType: TWebServiceBindingType;
FMimeBoundary: string;
FWSDLView: TWSDLView;
FSoapAction: string;
FUseUTF8InHeader: Boolean;
FInvokeOptions: TIdSOAPInvokeOptions;
fIdHttp: TIdCustomHttp;
fOnLog: TIdHTTPReqRespOnLog;
procedure SetURL(const Value: string);
function GetSOAPAction: string;
procedure SetSOAPAction(const SOAPAction: string);
procedure SetWSDLView(const WSDLVIew: TWSDLView);
function GetSOAPActionHeader: string;
protected
function _AddRef: Integer; stdcall;
function _Release: Integer; stdcall;
function GetMimeBoundary: string;
procedure SetMimeBoundary(Value: string);
procedure Log(aOutbound, aHeader: Boolean; St: TStream); virtual;
procedure LogString(aOutbound, aHeader: Boolean; S: string);
public
constructor Create(Owner: TComponent); override;
class function NewInstance: TObject; override;
procedure AfterConstruction; override;
destructor Destroy; override;
function GetHTTPReqResp: TIdHTTPReqResp;
procedure Get(Response: TStream); virtual;
{IWebNode}
procedure BeforeExecute(const IntfMD: TIntfMetaData;
const MethMD: TIntfMethEntry;
MethodIndex: Integer;
How to implement Web Services for Indy
- 25 -
AttachHandler: IMimeAttachmentHandler);
procedure Execute(const DataMsg: String; Response: TStream); overload; virtual;
procedure Execute(const Request: TStream; Response: TStream); overload; virtual;
function Execute(const Request: TStream): TStream; overload; virtual;
property URL: string read FURL write SetURL;
property SoapAction: string read GetSOAPAction write SetSOAPAction;
published
property HttpClient: TIdCustomHttp read fIdHttp;
property WSDLView: TWSDLView read FWSDLView write SetWSDLView;
property UseUTF8InHeader: Boolean read FUseUTF8InHeader write FUseUTF8InHeader;
property InvokeOptions: TIdSOAPInvokeOptions read FInvokeOptions write
FInvokeOptions;
property OnLog: TIdHTTPReqRespOnLog read fOnLog write fOnLog;
end;
implementation
uses
{$IFDEF MSWINDOWS}
Windows,
{$ENDIF}
Variants, SOAPConst, XMLDoc, XMLIntf, InvokeRegistry, WSDLItems,
SOAPAttach, UDDIHelper, IdIntercept, IdException, IdURI, IdGlobal, IdHeaderList,
IdHTTPHeaderInfo;
constructor EIdSOAPHTTPException.Create(const Msg: string; SCode: Integer = 0);
begin
inherited Create(Msg);
FStatusCode := SCode;
end;
constructor EIdSOAPHTTPException.CreateFmt(const Msg: string; const Args: array of
const; SCode: Integer = 0);
begin
inherited CreateFmt(Msg, Args);
FStatusCode := SCode;
end;
constructor TIdHTTPReqResp.Create(Owner: TComponent);
begin
inherited;
FIdHTTP:= TIdCustomHTTP.Create(Self);
FIdHttp.Request.AcceptCharSet:= 'utf-8';
FIdHttp.Request.UserAgent := 'Borland SOAP 1.2'; { Do not localize }
FInvokeOptions := [soIgnoreInvalidCerts];
end;
destructor TIdHTTPReqResp.Destroy;
begin
inherited;
end;
class function TIdHTTPReqResp.NewInstance: TObject;
begin
Result := inherited NewInstance;
TIdHTTPReqResp(Result).FRefCount := 1;
end;
procedure TIdHTTPReqResp.AfterConstruction;
begin
inherited;
FOwnerIsComponent := Assigned(Owner) and (Owner is TComponent);
How to implement Web Services for Indy
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InterlockedDecrement(FRefCount);
end;
{ IInterface }
function TIdHTTPReqResp._AddRef: Integer;
begin
Result := InterlockedIncrement(FRefCount)
end;
function TIdHTTPReqResp._Release: Integer;
begin
Result := InterlockedDecrement(FRefCount);
{ If we are not being used as a TComponent, then use refcount to manage our
lifetime as with TInterfacedObject. }
if (Result = 0) and not FOwnerIsComponent then
Destroy;
end;
function TIdHTTPReqResp.GetHTTPReqResp: TIdHTTPReqResp;
begin
Result := Self;
end;
function TIdHTTPReqResp.GetSOAPAction: string;
begin
if (FSoapAction = '') and not (soNoValueForEmptySOAPAction in FInvokeOptions) then
Result := '""'
else
Result := FSoapAction;
end;
procedure TIdHTTPReqResp.SetSOAPAction(const SOAPAction: string);
begin
FSoapAction := SOAPAction;
end;
procedure TIdHTTPReqResp.SetWSDLView(const WSDLVIew: TWSDLView);
begin
FWSDLView := WSDLView;
end;
procedure TIdHTTPReqResp.SetURL(const Value: string);
begin
FUserSetURL := Value <> '';
FURL := Value;
end;
procedure TIdHTTPReqResp.SetMimeBoundary(Value: string);
begin
FMimeBoundary := Value;
end;
function TIdHTTPReqResp.GetMimeBoundary: string;
begin
Result := FMimeBoundary;
end;
function TIdHTTPReqResp.GetSOAPActionHeader: string;
begin
if (SoapAction = '') then
How to implement Web Services for Indy
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Result := SHTTPSoapAction + ':'
else if (SoapAction = '""') then
Result := SHTTPSoapAction + ': ""'
else
Result := SHTTPSoapAction + ': ' + '"' + SoapAction + '"';
end;
{ Here the RIO can perform any transports specific setup before call - XML
serialization is done }
procedure TIdHTTPReqResp.BeforeExecute(const IntfMD: TIntfMetaData;
const MethMD: TIntfMethEntry;
MethodIndex: Integer;
AttachHandler: IMimeAttachmentHandler);
var
MethName: InvString;
Binding: InvString;
QBinding: IQualifiedName;
begin
if FUserSetURL then
begin
MethName := InvRegistry.GetMethExternalName(IntfMD.Info, MethMD.Name);
FSoapAction := InvRegistry.GetActionURIOfInfo(IntfMD.Info, MethName,
MethodIndex);
end
else
begin
{ User did *NOT* set a URL }
if WSDLView <> nil then
begin
{ Make sure WSDL is active }
if fIdHttp.ProxyParams.ProxyServer <> '' then
begin
WSDLView.Proxy:= fIdHttp.ProxyParams.ProxyServer +
':'+IntToStr(fIdHttp.ProxyParams.ProxyPort);
WSDLView.UserName:= fIdHttp.ProxyParams.ProxyUsername;
WSDLView.Password:= fIdHttp.ProxyParams.ProxyPassword;
end else
begin
{ no proxy with Username/Password implies basic authentication }
WSDLView.UserName:= fIdHttp.Request.Username;
WSDLView.Password:= fIdHttp.Request.Password;
end;
WSDLView.Activate;
QBinding := WSDLView.WSDL.GetBindingForServicePort(WSDLView.Service,
WSDLView.Port);
if QBinding <> nil then
begin
Binding := QBinding.Name;
MethName:= InvRegistry.GetMethExternalName(WSDLView.IntfInfo,
WSDLView.Operation);
{ TODO: Better to Pass in QBinding here to avoid tricky confusion due to
lack of namespace }
FSoapAction := WSDLView.WSDL.GetSoapAction(Binding, MethName, 0);
end;
{NOTE: In case we can't get the SOAPAction - see if we have something in the
registry }
{ It can't hurt:) }
if FSoapAction = '' then
InvRegistry.GetActionURIOfInfo(IntfMD.Info, MethName, MethodIndex);
{ Retrieve URL }
How to implement Web Services for Indy
- 28 -
FURL := WSDLView.WSDL.GetSoapAddressForServicePort(WSDLView.Service,
WSDLView.Port);
if (FURL = '') then
raise EIdSOAPHTTPException.CreateFmt(sCantGetURL, [WSDLView.Service,
WSDLView.Port, WSDLView.WSDL.FileName]);
end
else
raise EIdSOAPHTTPException.Create(sNoWSDLURL);
end;
{ Are we sending attachments?? }
if AttachHandler <> nil then
begin
FBindingType := btMIME;
{ If yes, ask MIME handler what MIME boundary it's using to build the Multipart
packet }
FMimeBoundary := AttachHandler.MIMEBoundary;
{ Also customize the MIME packet for transport specific items }
if UseUTF8InHeader then
AttachHandler.AddSoapHeader(Format(ContentTypeTemplate, [ContentTypeUTF8]))
else
AttachHandler.AddSoapHeader(Format(ContentTypeTemplate, [ContentTypeNoUTF8]));
AttachHandler.AddSoapHeader(GetSOAPActionHeader);
end else
FBindingType := btSOAP;
end;
function DateTimemsToStr(aDT: TDateTime): string;
begin
Result:= FormatDateTime(ShortDateFormat+' hh:nn:ss.zzz', aDT);
end;
const
ProtocolVersionString: array[TIdHTTPProtocolVersion] of string = ('1.0', '1.1');
procedure TIdHTTPReqResp.Execute(const Request: TStream; Response: TStream);
var
URI: TIdURI;
ContentType: string;
begin
fIdHttp.Request.CustomHeaders.Clear;
if FBindingType = btMIME then
begin
fIdHttp.Request.ContentType:= Format(ContentHeaderMIME, [FMimeBoundary]);
fIdHttp.Request.CustomHeaders.Add(MimeVersion);
end else { Assume btSOAP }
begin
fIdHttp.Request.ContentType := sTextXML;
fIdHttp.Request.CustomHeaders.Add(GetSOAPActionHeader);
end;
URI := TIdURI.Create(fURL);
try
if URI.Port <> '' then
{$IFDEF INDY10}
fIdHttp.URL.Port := URI.Port;
{$ELSE}
fIdHttp.URL.Port := URI.Port;
{$ENDIF}
if URI.Host <> '' then
How to implement Web Services for Indy
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fIdHttp.{$IFDEF INDY10}URL.{$ENDIF}Host := URI.Host
else
fIdHttp.{$IFDEF INDY10}URL.{$ENDIF}Host := Copy(fURL, Length('http://')+1,
Pos(':' + URI.Port, fURL) - (Length('http://')+1));
finally
URI.Free;
end;
{$IFNDEF INDY10}
fIdHttp.InputBuffer.Clear;
{$ENDIF}
try // log here to log correct stamp
LogString(False, True, Format('POST %s HTTP/%s [%s @ %s]', [fURL,
ProtocolVersionString[fIdHttp.ProtocolVersion], Name, DateTimeMsToStr(Now)])+#13#10);
//fIdHttp.Request.CustomHeaders.Values['X-Debug']:= Format('%s %s', [UrlS,
DateTimeToXMLDateTime(Now)]);
fIdHttp.Request.SetHeaders; // postponed to log correct RawHeaders
LogString(False, True, fIdHttp.Request.RawHeaders.Text);
Log(False, False, Request);
Request.Position:= 0;
except
end;
try
try
fIdHttp.Post(fURL, Request, Response);
except
on E: Exception do
begin
try
LogString(True, True, E.Message+#13#10);
except
end;
raise;
end;
end;
finally
if Response.Size > 0 then
begin
try
LogString(True, True, fIdHttp.ResponseText+Format(' [%s @ %s]', [Name,
DateTimeMsToStr(Now)])+#13#10);
LogString(True, True, fIdHttp.Response.RawHeaders.Text);
Log(True, False, Response);
Response.Position:= 0;
except
end;
end;
end;
ContentType := fIdHttp.Response.RawHeaders.Values[SContentType];
FMimeBoundary := GetMimeBoundaryFromType(ContentType);
if Response.Size = 0 then
raise EIdSOAPHTTPException.Create(SInvalidHTTPResponse);
if SameText(ContentType, ContentTypeTextPlain) or
SameText(ContentType, STextHtml) then
raise EIdSOAPHTTPException.CreateFmt(SInvalidContentType, [ContentType]);
end;
procedure TIdHTTPReqResp.Execute(const DataMsg: String; Response: TStream);
var
How to implement Web Services for Indy
- 30 -
Stream: TMemoryStream;
begin
Stream := TMemoryStream.Create;
try
Stream.SetSize(Length(DataMsg));
Stream.Write(DataMsg[1], Length(DataMsg));
Execute(Stream, Response);
finally
Stream.Free;
end;
end;
function TIdHTTPReqResp.Execute(const Request: TStream): TStream;
begin
Result := TMemoryStream.Create;
Execute(Request, Result);
end;
procedure TIdHTTPReqResp.Get(Response: TStream);
begin
if URL = '' then
raise EIdSOAPHTTPException.Create(SEmptyURL);
fIdHttp.Request.Accept := '*/*';
fIdHttp.Request.ContentType := sTextXml;
fIdHttp.Request.CustomHeaders.Clear;
try
LogString(False, True, Format('GET %s HTTP/%s [%s @ %s]', [fURL,
ProtocolVersionString[fIdHttp.ProtocolVersion], Name, DateTimeMsToStr(Now)])+#13#10);
//fIdHttp.Request.CustomHeaders.Values['X-Debug']:= Format('%s %s', [UrlS,
DateTimeToXMLDateTime(Now)]);
fIdHttp.Request.SetHeaders; // postponed to log correct RawHeaders
LogString(False, True, fIdHttp.Request.RawHeaders.Text);
except
end;
try
fIdHttp.Get(URL, Response);
finally
if Response.Size > 0 then
begin
try
LogString(True, True, fIdHttp.ResponseText+Format(' [%s @ %s]', [Name,
DateTimeMsToStr(Now)])+#13#10);
LogString(True, True, fIdHttp.Response.RawHeaders.Text);
Log(True, False, Response);
Response.Position:= 0;
except
end;
end;
end;
end;
procedure TIdHTTPReqResp.Log(aOutbound, aHeader: Boolean; St: TStream);
begin
if Assigned(fOnLog) then
begin
St.Position:= 0;
fOnLog(Self, aOutbound, aHeader, St);
end;
end;
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procedure TIdHTTPReqResp.LogString(aOutbound, aHeader: Boolean; S: string);
var
St: TStringStream;
begin
St:= TStringStream.Create(S);
try
Log(aOutbound, aHeader, St);
finally
St.Free;
end;
end;
end.